Answer: Chain of command
Explanation:
The chain of command is one of the type of official organizational hierarchy in which the various types of relationship are establishing the accountability and the power for making the various types of decisions.
The chain of command is basically responsible for filing various types of issues or complaints in an organization for the employees or workers.
According to the given question, the salesperson is experiencing the issue with the chain of command as salesperson is working in the shipping department and the company's accounting department told him to turn his weekly account of the expenditure.
Therefore, Chain of command is the correct answer.